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Organic garbage and sludge mixed solid fuel and preparation method thereof

A technology of organic waste and solid fuel, applied in the direction of solid fuel, fuel, waste fuel, etc., can solve the problems of high cost of waste incineration, waste of recyclable resources, etc., achieve good social and environmental benefits, realize resource utilization, production simple method effect

Inactive Publication Date: 2008-07-09
TIANJIN URBAN CONSTR COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a solid fuel mixed with organic waste and sludge and its preparation method for the huge waste of recyclable resources in the existing urban waste and the high cost of waste incineration. Garbage is used as the main component of raw materials, and water-soluble wastewater sludge is used as a binder to realize the recycling, harmless and reduction treatment of solid organic waste

Method used

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preparation example Construction

[0015] The preparation process of the present invention involves three stages of raw material preparation, molding and consolidation.

[0016] The preparation of raw materials includes drying, crushing and mixing of raw materials. Due to the high moisture content of the collected domestic waste, in order to meet the moisture requirements of the briquette fuel, the organic waste that has removed heavy metals, large brick slag, tiles and other inorganic components is dried or dehydrated by natural air drying, and its moisture content is controlled at 4 % to 8%; then the pulverized coal and the dried household garbage are crushed into particles of 3mm to 10mm by ordinary crushing machinery; Fully mixed, in order to make the surface of the raw material particles evenly wetted by the sludge, cover the surface of the garbage and coal particles, achieve the best bonding effect, and make the combustion improver, desulfurization and dechlorination agent, etc. evenly distributed, which ...

Embodiment 1

[0023] Mix organic waste particles, sludge, and coal powder particles with a moisture content of 4% to 8% after drying in a ratio of 1:1:2, and add a combustion aid MnO 2 content of 0.18%, desulfurization and dechlorination agent CaO content of 0.90%, mix evenly, and keep the moisture content at 8% to 12%; then knead and shape, and then dry naturally to a solid fuel product with a moisture content of 5% to 15%. . The compressive strength of the solid fuel is measured by "Method for Determination of Cold Compressive Strength of Industrial Briquette" (MT / T748-1997), and the compressive strength of the solid fuel is determined to be in the range of 167.2620kPa to 207.0788kPa, with a reliability of 95%.

Embodiment 2

[0025] Mix organic waste particles, coal powder particles, and sludge with a moisture content of 4% to 8% after drying in a ratio of 2:1:1, and add a combustion aid MnO 2 The content is 0.17%, the desulfurization and dechlorination agent CaO content is 1.20%, mix well, and keep the moisture content at 8% to 12%; then knead and shape, and then dry naturally to a solid fuel product with a moisture content of 5% to 15%. . After immersing the molded solid fuel product in water (at room temperature) for 24 hours, the water immersion strength of the solid fuel was measured using the "Measurement Method for Water Immersion Strength and Water Immersion Re-drying Strength of Industrial Briquettes" (MT / T749-1997). The water immersion strength of the solid fuel is in the range of 18.74458kPa to 23.484038kPa, and the reliability is 95%.

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Abstract

The invention discloses solid fuel which is mixed by organic waste and sludge and a process for preparation. The solid fuel comprises the organic waste: 25%-55%, the sludge: 20%-50%, coal powder: 20%-50%, combustion improver: 0.15%-0.25% and desulfurization dechlorinating agent 0.5%-2%. The process for preparation comprises three stages of raw material preparation, molding and consolidation. The invention is tested by the solid fuel mechanical strength, burning characteristics, pollution control and the like. The solid fuel which is mixed by the organic waste and the sludge and prepared by the manufacturing process of the invention is comparatively ideal clean fuel with higher mechanical strength and can satisfy long-distance transportation with the falling strength more than 99%, the invention is the solid fuel with strong mechanical strength, good water resistance, excellent combustion characteristics, strong thermal stability and non pollution and can be extended to be applied in civilian uses and industrial sectors. The invention can also save a great amount of non-renewable fossil fuels such as petroleum, coal and the like with good social and environmental benefits.

Description

【Technical field】 [0001] The invention relates to the technical field of domestic garbage and sludge resource utilization and environmental protection energy, in particular to a solid fuel capable of reducing, harmless and resourceful treatment of urban domestic garbage mixed with organic garbage and sludge and its preparation method. 【Background technique】 [0002] The annual output of "urban waste" in my country alone is nearly 150 million tons, and it is increasing at an annual rate of 7% to 9%. According to incomplete statistics, China's urban domestic waste has been piled up to more than 6 billion tons over the years, and about two-thirds of the cities are trapped in the predicament of garbage siege. The vast majority of urban waste is piled in the open air, which not only affects the urban landscape, but also pollutes the atmosphere, water and soil that are vital to our lives, posing a threat to the health of urban residents. Garbage has become a thorny problem in ur...

Claims

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Application Information

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IPC IPC(8): C10L5/40
CPCY02E50/30
Inventor 吴丽萍文科军
Owner TIANJIN URBAN CONSTR COLLEGE
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